Do It Yourself Diy Cat Door . Made from detachable wooden panels, this cat enclosure is easy to assemble and move around, in case you intend to shift in a new house soon. Step (3) remove existing glass unit, step (4) apply glazing tape around inside edge of sliding door frame. Easy DIY Cat Enclosure to keep your indoor cats happy and safe from cuckoo4design.com Pine boards, plywood, deck screws, fence panels, plastic roof panels, outdoor carpet, black paint, cat door: Timer ensures that door stays unlocked long enough to give cat a chance to respond. It’s finished with wood stain and varnish, and makes an ideal weekend project.